Power supply with voltage stabilizing control circuit

Details Power supply with voltage stabilizing control circuit Power supply with voltage stabilizing control circuit

1997-08-20

1999-03-16

Riley, Shawn

Electricity: power supply or regulation systems

Output level responsive

Using an impedance as the final control device

323222, G05F 112

Patent

active

058835067

ABSTRACT:
An arbitrary input AC voltage is applied from an external power supply (1) to a rectifying circuit (2), and one rectifying output end of the rectifying circuit is connected to a switching element (4) through a coil (3), while the other rectifying output end of the rectifying circuit is connected to a common terminal of the switching element through a detecting circuit (5) for a current waveform. Further, a peak value wave detecting circuit formed of a diode (6) and a capacitor (7) is connected in parallel with the switching element (4) so that a step-up chopper circuit is formed. A detecting circuit (10) for an output voltage having two resistors (9a), (9b) is connected between both ends of this capacitor (7). The one rectifying output end of the rectifying circuit (2) is connected to a detecting circuit (11) for an effective voltage value, and the two resistors (9a), (9b) for detecting the output voltage of the detecting circuit (10) are selected by a detecting signal of the detecting circuit (11). The detecting signals of these detecting circuits (5), (10), (11) are supplied to a control block (12) for controlling turning-on and turning-off timings of the switching element (4).

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